OP, don't feel bad, those families will move on and in a short time forget all about you...do what makes you and your family happy!
If I ever decide to close, it sure wont be cause of the kids, or their (sometime) obnoxious parents!....it'll be cause I have had it with Licensing and all their rules and regulations! I understand we work with defenseless little children but still, some regulations seem to be on the book just to make number, and add to our stress!
